Ultimate Ears Wonderboom 2 Portable Bluetooth Speaker - Wireless Waterproof IP67 Dustproof Floating Speaker with 360° Sound & Deep Bass, 100ft Range (Crushed Ice Grey) - Perfect for Pool Parties, Beach Trips & Outdoor Adventures

I was a little nervous pulling the trigger on this little guy. I wasn't sure if (due to it's size) would pack enough of a punch to fill our backyard while pool side. When the "outdoor boost" button is activated is where this little monster shines. I cannot believe how loud, clear and great the speaker sounds. A huge plus for us and being able to centrally locate the speaker in our yard, allowing the 360 degree sound surround all corners of the property. Couldn't be happier. Not to mention the fact that when inevitably our 5 year old or 1 year old decides to toss it into the pool, we have no worries due to the floating design and waterproof toughness :)